Unconsolidated Affiliate (Tables)

3 Months Ended

Mar. 31, 2016

Equity Method Investments and Joint Ventures [Abstract]

Schedule of ART's results of operations

The following summary presents ART's results of operations.

	Three Months Ended March 31,
(In millions)	2016		2015
Summary of Statement of Operations information:
Net sales	$	64.0	$	77.2
Costs and expenses applicable to net sales	48.2		64.7
Income before income taxes	13.9		12.6
Net income	13.8		12.3

Schedule of financial data related to transactions between Grace and ART

The table below presents summary financial data related to transactions between Grace and ART.

	Three Months Ended March 31,
(In millions)	2016		2015
Grace sales of catalysts to ART	$	56.5	$	54.2
Charges for fixed costs, research and development and selling, general and administrative services to ART	6.2		5.9